https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109877
Bug ID: 109877
Summary: Support for clang-style attributes is needed to parse
Darwin SDK headers properly
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: iains at gcc dot gnu.org
Target Milestone: ---
clang has GNU-style attribute support, but with essentially per-attribute
parsing of the attribute argument list.
This extends to, for example:
__attribute__((availability(macOS, introduced=12.3.4)))
and:
__attribute__((availability(macOS, message="partial string" "more string")))
These are examples that GCC rejects;
The issue actually need addressing during lexing since the first is an invalid
token for a number (it's intended to represent a version) and we reject it
before the parser has a chance to treat it specially.
Ergo, we need a way to escape clang-specific attributes so that we can parse
them.
